netdev - Re: [PATCH net-next 1/4] via-rhine: commit receive buffer address before descriptor status update.

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Message-Id: <20150407.155209.47396464487922345.davem@davemloft.net>
Date:	Tue, 07 Apr 2015 15:52:09 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	romieu@...zoreil.com
Cc:	netdev@...r.kernel.org, nix@...eri.org.uk, rl@...lgate.ch,
	gurligebis@...too.org
Subject: Re: [PATCH net-next 1/4] via-rhine: commit receive buffer address
 before descriptor status update.

From: Francois Romieu <romieu@...zoreil.com>
Date: Mon,  6 Apr 2015 20:01:49 +0200

> Signed-off-by: Francois Romieu <romieu@...zoreil.com>
> ---
>  drivers/net/ethernet/via/via-rhine.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/net/ethernet/via/via-rhine.c b/drivers/net/ethernet/via/via-rhine.c
> index a191afc..00fea3d 100644
> --- a/drivers/net/ethernet/via/via-rhine.c
> +++ b/drivers/net/ethernet/via/via-rhine.c
> @@ -2063,6 +2063,7 @@ static int rhine_rx(struct net_device *dev, int limit)
>  				break;
>  			}
>  			rp->rx_ring[entry].addr = cpu_to_le32(rp->rx_skbuff_dma[entry]);
> +			wmb();

dma_wmb() perhaps?  I think this is exactly the situation that interface was
added for.
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